JPS5849358Y2 - Winding drum for screen door - Google Patents

Description

[Detailed description of the invention] The present invention relates to a screen door winding drum that can easily and accurately wind up a screen. At the same time, a concave groove is formed in the center of the horizontal portion with both sides protruding inward, and an arrowhead protrusion that can be fitted into and locked in the concave groove is provided protruding from the lower horizontal surface, and the upper surface is the outer circumferential surface of the drum. This invention relates to a winding drum for a screen door, which is constructed by bendably attaching a lid body having the same circular arc to one end of the horizontal portion of the upper surface of the drum.

Conventional winding drums for screen doors of this type had a concave groove formed in a part of the cylinder, the end of the screen was inserted into this concave groove, and this was held down with a fixed bar, but the installation was unstable. At the same time, it is difficult to attach the ends of the screen door so that the left and right sides are aligned accurately, and unevenness occurs in the part where the brackets are attached.
There were drawbacks such as these unevenness becoming an obstacle when winding up the net.

The hoisting drum according to the present invention relates to a completely new technology developed in view of the drawbacks of the conventional technology.

To specifically explain one embodiment of the present invention with reference to the drawings, the first embodiment is as follows.
In the drawings to FIG. 3, reference numeral 1 denotes a drum capable of winding up the screen door 2, and is rotatably mounted within the cover 4 on the upper part of the door frame 3.

The upper surface of this drum 1 is cut horizontally to form a horizontal part 5, and a groove 6 is formed in the center of this horizontal part 5.
Horizontal protrusions a are provided on both sides of the entrance of the concave groove 6.

Reference numeral 7 denotes a thick-walled lid whose lower surface has a horizontal surface that can come into close contact with the horizontal portion 5 of the drum 1 and whose upper surface has the same arc as the outer surface of the drum 1. The cover body 7 is integrally and bendably connected to one end thereof, and has an arrowhead protrusion 8 protruding from the lower surface thereof which can be fitted into the groove 6 of the drum 1 and locked therein.

As mentioned above, the drum according to the present invention has a horizontal part formed on the upper surface and a lid body attached to one end of the horizontal part so that the lid body can be bent freely. Place the end of the screen door on the horizontal part, align the left and right sides of the screen door accurately by pressing this end against the lid body, then lower the lid body and insert the arrowhead protrusion provided on the bottom surface of the screen door. By fitting the strip into the recessed groove, it is possible to wrap the ends of the screen door and the recessed groove at the same time and fix them in a stable state.Furthermore, the mounting and fixing part of this screen door is completely covered by the lid body. Since the top surface of the lid has the same arc as the external surface of the drum, there will be no unevenness on the mounting area of the screen door, and there is no risk that this will become an obstacle when winding up the screen door. It has the characteristics of being able to make the process extremely smooth.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional diagram of the entire screen door. FIG. 3 is an explanatory diagram of the drum. Figures 2 and 2 1...drum, 2...screen door, 7... Lid body, 8... Projection. 5...Horizontal part, 6...concave groove,

Claims (1)

[Scope of utility model registration request] In a rotary winding drum for winding up a screen door, the upper surface of the drum is formed horizontally, and a groove is formed in the center of the horizontal part with both sides protruding inward, and the drum can be fitted and locked into the groove. A winding screen door comprising a cover body having an arrowhead protrusion protruding from the horizontal lower surface and whose upper surface has the same arc as the outer peripheral surface of the drum, which is bendably attached to one end of the horizontal portion of the upper surface of the drum. drum.